Tired of using PVC tubes with your resin? Welcome to the world of using HDP tubes! Each tube comes with a silicone plug sized just right for this HDPE tube. HDPE releases Alumilite, Epoxy Resins such as Stones Resin, PR, and so many others!! HDPE outlasts PVC tubing many times over!! Each tube is cut at 8" in length just in case you want a little extra for cutoff projects.